Annotation of src/usr.bin/openssl/ts.c, Revision 1.19
1.19 ! inoguchi 1: /* $OpenBSD: ts.c,v 1.18 2022/03/24 11:27:45 inoguchi Exp $ */
1.1 jsing 2: /* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL
3: * project 2002.
4: */
5: /* ====================================================================
6: * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: *
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: *
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in
17: * the documentation and/or other materials provided with the
18: * distribution.
19: *
20: * 3. All advertising materials mentioning features or use of this
21: * software must display the following acknowledgment:
22: * "This product includes software developed by the OpenSSL Project
23: * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24: *
25: * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26: * endorse or promote products derived from this software without
27: * prior written permission. For written permission, please contact
28: * licensing@OpenSSL.org.
29: *
30: * 5. Products derived from this software may not be called "OpenSSL"
31: * nor may "OpenSSL" appear in their names without prior written
32: * permission of the OpenSSL Project.
33: *
34: * 6. Redistributions of any form whatsoever must retain the following
35: * acknowledgment:
36: * "This product includes software developed by the OpenSSL Project
37: * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38: *
39: * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50: * OF THE POSSIBILITY OF SUCH DAMAGE.
51: * ====================================================================
52: *
53: * This product includes cryptographic software written by Eric Young
54: * (eay@cryptsoft.com). This product includes software written by Tim
55: * Hudson (tjh@cryptsoft.com).
56: *
57: */
58:
59: #include <stdio.h>
60: #include <stdlib.h>
61: #include <string.h>
62:
63: #include "apps.h"
64:
65: #include <openssl/bio.h>
66: #include <openssl/bn.h>
67: #include <openssl/err.h>
68: #include <openssl/pem.h>
69: #include <openssl/ts.h>
70:
71: /* Length of the nonce of the request in bits (must be a multiple of 8). */
72: #define NONCE_LENGTH 64
73:
74: /* Macro definitions for the configuration file. */
75: #define ENV_OID_FILE "oid_file"
76:
77: /* Local function declarations. */
78:
79: static ASN1_OBJECT *txt2obj(const char *oid);
80: static CONF *load_config_file(const char *configfile);
81:
82: /* Query related functions. */
83: static int query_command(const char *data, char *digest,
1.19 ! inoguchi 84: const EVP_MD *md, const char *policy, int no_nonce,
1.1 jsing 85: int cert, const char *in, const char *out, int text);
86: static BIO *BIO_open_with_default(const char *file, const char *mode,
1.19 ! inoguchi 87: FILE *default_fp);
! 88: static TS_REQ *create_query(BIO *data_bio, char *digest, const EVP_MD *md,
1.1 jsing 89: const char *policy, int no_nonce, int cert);
1.19 ! inoguchi 90: static int create_digest(BIO *input, char *digest,
! 91: const EVP_MD *md, unsigned char **md_value);
1.1 jsing 92: static ASN1_INTEGER *create_nonce(int bits);
93:
94: /* Reply related functions. */
1.19 ! inoguchi 95: static int reply_command(CONF *conf, char *section,
1.1 jsing 96: char *queryfile, char *passin, char *inkey,
97: char *signer, char *chain, const char *policy,
98: char *in, int token_in, char *out, int token_out,
99: int text);
1.19 ! inoguchi 100: static TS_RESP *read_PKCS7(BIO *in_bio);
! 101: static TS_RESP *create_response(CONF *conf, const char *section,
1.1 jsing 102: char *queryfile, char *passin, char *inkey,
103: char *signer, char *chain, const char *policy);
1.19 ! inoguchi 104: static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data);
1.1 jsing 105: static ASN1_INTEGER *next_serial(const char *serialfile);
1.19 ! inoguchi 106: static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial);
1.1 jsing 107:
108: /* Verify related functions. */
109: static int verify_command(char *data, char *digest, char *queryfile,
110: char *in, int token_in,
111: char *ca_path, char *ca_file, char *untrusted);
112: static TS_VERIFY_CTX *create_verify_ctx(char *data, char *digest,
113: char *queryfile,
114: char *ca_path, char *ca_file,
115: char *untrusted);
116: static X509_STORE *create_cert_store(char *ca_path, char *ca_file);
1.19 ! inoguchi 117: static int verify_cb(int ok, X509_STORE_CTX *ctx);
1.1 jsing 118:
1.18 inoguchi 119: enum mode {
120: CMD_NONE, CMD_QUERY, CMD_REPLY, CMD_VERIFY
121: };
122:
123: static struct {
124: char *ca_file;
125: char *ca_path;
126: int cert;
127: char *chain;
128: char *configfile;
129: char *data;
130: char *digest;
131: char *in;
132: char *inkey;
133: const EVP_MD *md;
134: int mode;
135: int no_nonce;
136: char *out;
137: char *passin;
138: char *policy;
139: char *queryfile;
140: char *section;
141: char *signer;
142: int text;
143: int token_in;
144: int token_out;
145: char *untrusted;
146: } ts_config;
147:
148: static int
149: ts_opt_md(int argc, char **argv, int *argsused)
150: {
151: char *name = argv[0];
152:
153: if (*name++ != '-')
154: return (1);
155:
156: if ((ts_config.md = EVP_get_digestbyname(name)) == NULL)
157: return (1);
158:
159: *argsused = 1;
160: return (0);
161: }
162:
163: static int
164: ts_opt_query(void)
165: {
166: if (ts_config.mode != CMD_NONE)
167: return (1);
168: ts_config.mode = CMD_QUERY;
169: return (0);
170: }
171:
172: static int
173: ts_opt_reply(void)
174: {
175: if (ts_config.mode != CMD_NONE)
176: return (1);
177: ts_config.mode = CMD_REPLY;
178: return (0);
179: }
180:
181: static int
182: ts_opt_verify(void)
183: {
184: if (ts_config.mode != CMD_NONE)
185: return (1);
186: ts_config.mode = CMD_VERIFY;
187: return (0);
188: }
189:
190: static const struct option ts_options[] = {
191: {
192: .name = "CAfile",
193: .argname = "file",
194: .desc = "Certificate Authority file",
195: .type = OPTION_ARG,
196: .opt.arg = &ts_config.ca_file,
197: },
198: {
199: .name = "CApath",
200: .argname = "path",
201: .desc = "Certificate Authority path",
202: .type = OPTION_ARG,
203: .opt.arg = &ts_config.ca_path,
204: },
205: {
206: .name = "cert",
207: .desc = "Include signing certificate in the response",
208: .type = OPTION_FLAG,
209: .opt.flag = &ts_config.cert,
210: },
211: {
212: .name = "chain",
213: .argname = "file",
214: .desc = "PEM certificates that will be included in the response",
215: .type = OPTION_ARG,
216: .opt.arg = &ts_config.chain,
217: },
218: {
219: .name = "config",
220: .argname = "file",
221: .desc = "Specify an alternative configuration file",
222: .type = OPTION_ARG,
223: .opt.arg = &ts_config.configfile,
224: },
225: {
226: .name = "data",
227: .argname = "file",
228: .desc = "Data file for which the time stamp request needs to be created",
229: .type = OPTION_ARG,
230: .opt.arg = &ts_config.data,
231: },
232: {
233: .name = "digest",
234: .argname = "arg",
235: .desc = "Specify the message imprint explicitly without the data file",
236: .type = OPTION_ARG,
237: .opt.arg = &ts_config.digest,
238: },
239: {
240: .name = "in",
241: .argname = "file",
242: .desc = "Input file",
243: .type = OPTION_ARG,
244: .opt.arg = &ts_config.in,
245: },
246: {
247: .name = "inkey",
248: .argname = "file",
249: .desc = "Input key file",
250: .type = OPTION_ARG,
251: .opt.arg = &ts_config.inkey,
252: },
253: {
254: .name = "no_nonce",
255: .desc = "Specify no nonce in the request",
256: .type = OPTION_FLAG,
257: .opt.flag = &ts_config.no_nonce,
258: },
259: {
260: .name = "out",
261: .argname = "file",
262: .desc = "Output file",
263: .type = OPTION_ARG,
264: .opt.arg = &ts_config.out,
265: },
266: {
267: .name = "passin",
268: .argname = "src",
269: .desc = "Private key password source",
270: .type = OPTION_ARG,
271: .opt.arg = &ts_config.passin,
272: },
273: {
274: .name = "policy",
275: .argname = "object_id",
276: .desc = "Policy for the TSA to use when creating the time stamp token",
277: .type = OPTION_ARG,
278: .opt.arg = &ts_config.policy,
279: },
280: {
281: .name = "query",
282: .desc = "Create and print a time stamp request",
283: .type = OPTION_FUNC,
284: .opt.func = ts_opt_query,
285: },
286: {
287: .name = "queryfile",
288: .argname = "file",
289: .desc = "File containing a DER-encoded time stamp request",
290: .type = OPTION_ARG,
291: .opt.arg = &ts_config.queryfile,
292: },
293: {
294: .name = "reply",
295: .desc = "Create a time stamp response",
296: .type = OPTION_FUNC,
297: .opt.func = ts_opt_reply,
298: },
299: {
300: .name = "section",
301: .argname = "arg",
302: .desc = "TSA section containing the settings for response generation",
303: .type = OPTION_ARG,
304: .opt.arg = &ts_config.section,
305: },
306: {
307: .name = "signer",
308: .argname = "file",
309: .desc = "Signer certificate file",
310: .type = OPTION_ARG,
311: .opt.arg = &ts_config.signer,
312: },
313: {
314: .name = "text",
315: .desc = "Output in human-readable text format",
316: .type = OPTION_FLAG,
317: .opt.flag = &ts_config.text,
318: },
319: {
320: .name = "token_in",
321: .desc = "Input is a DER-encoded time stamp token",
322: .type = OPTION_FLAG,
323: .opt.flag = &ts_config.token_in,
324: },
325: {
326: .name = "token_out",
327: .desc = "Output is a DER-encoded time stamp token",
328: .type = OPTION_FLAG,
329: .opt.flag = &ts_config.token_out,
330: },
331: {
332: .name = "untrusted",
333: .argname = "file",
334: .desc = "File containing untrusted certificates",
335: .type = OPTION_ARG,
336: .opt.arg = &ts_config.untrusted,
337: },
338: {
339: .name = "verify",
340: .desc = "Verify a time stamp response",
341: .type = OPTION_FUNC,
342: .opt.func = ts_opt_verify,
343: },
344: {
345: .name = NULL,
346: .desc = "",
347: .type = OPTION_ARGV_FUNC,
348: .opt.argvfunc = ts_opt_md,
349: },
350: { NULL },
351: };
352:
353: static void
354: ts_usage(void)
355: {
356: fprintf(stderr, "usage:\n"
357: "ts -query [-md4 | -md5 | -ripemd160 | -sha1] [-cert]\n"
358: " [-config configfile] [-data file_to_hash]\n"
359: " [-digest digest_bytes] [-in request.tsq] [-no_nonce]\n"
360: " [-out request.tsq] [-policy object_id] [-text]\n");
361: fprintf(stderr, "\n"
362: "ts -reply [-chain certs_file.pem] [-config configfile]\n"
363: " [-in response.tsr] [-inkey private.pem] [-out response.tsr]\n"
364: " [-passin arg] [-policy object_id] [-queryfile request.tsq]\n"
365: " [-section tsa_section] [-signer tsa_cert.pem] [-text]\n"
366: " [-token_in] [-token_out]\n");
367: fprintf(stderr, "\n"
368: "ts -verify [-CAfile trusted_certs.pem]\n"
369: " [-CApath trusted_cert_path] [-data file_to_hash]\n"
370: " [-digest digest_bytes] [-in response.tsr]\n"
371: " [-queryfile request.tsq] [-token_in]\n"
372: " [-untrusted cert_file.pem]\n");
373: fprintf(stderr, "\n");
374: options_usage(ts_options);
375: fprintf(stderr, "\n");
376: }
377:
1.1 jsing 378: int
379: ts_main(int argc, char **argv)
380: {
381: int ret = 1;
382: CONF *conf = NULL;
383: char *password = NULL; /* Password itself. */
1.11 doug 384:
385: if (single_execution) {
1.14 deraadt 386: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
1.11 doug 387: perror("pledge");
1.13 doug 388: exit(1);
389: }
1.11 doug 390: }
1.1 jsing 391:
1.18 inoguchi 392: memset(&ts_config, 0, sizeof(ts_config));
393: ts_config.mode = CMD_NONE;
394:
395: if (options_parse(argc, argv, ts_options, NULL, NULL) != 0)
396: goto usage;
1.1 jsing 397:
398: /* Get the password if required. */
1.18 inoguchi 399: if (ts_config.mode == CMD_REPLY && ts_config.passin &&
400: !app_passwd(bio_err, ts_config.passin, NULL, &password, NULL)) {
1.1 jsing 401: BIO_printf(bio_err, "Error getting password.\n");
402: goto cleanup;
403: }
404: /*
405: * Check consistency of parameters and execute the appropriate
406: * function.
407: */
1.18 inoguchi 408: switch (ts_config.mode) {
1.1 jsing 409: case CMD_NONE:
410: goto usage;
411: case CMD_QUERY:
412: /*
413: * Data file and message imprint cannot be specified at the
414: * same time.
415: */
1.18 inoguchi 416: ret = ts_config.data != NULL && ts_config.digest != NULL;
1.1 jsing 417: if (ret)
418: goto usage;
419: /* Load the config file for possible policy OIDs. */
1.18 inoguchi 420: conf = load_config_file(ts_config.configfile);
421: ret = !query_command(ts_config.data, ts_config.digest, ts_config.md, ts_config.policy, ts_config.no_nonce, ts_config.cert,
422: ts_config.in, ts_config.out, ts_config.text);
1.1 jsing 423: break;
424: case CMD_REPLY:
1.18 inoguchi 425: conf = load_config_file(ts_config.configfile);
426: if (ts_config.in == NULL) {
427: ret = !(ts_config.queryfile != NULL && conf != NULL && !ts_config.token_in);
1.1 jsing 428: if (ret)
429: goto usage;
430: } else {
431: /* 'in' and 'queryfile' are exclusive. */
1.18 inoguchi 432: ret = !(ts_config.queryfile == NULL);
1.1 jsing 433: if (ret)
434: goto usage;
435: }
436:
1.18 inoguchi 437: ret = !reply_command(conf, ts_config.section, ts_config.queryfile,
438: password, ts_config.inkey, ts_config.signer, ts_config.chain, ts_config.policy,
439: ts_config.in, ts_config.token_in, ts_config.out, ts_config.token_out, ts_config.text);
1.1 jsing 440: break;
441: case CMD_VERIFY:
1.18 inoguchi 442: ret = !(((ts_config.queryfile && !ts_config.data && !ts_config.digest) ||
443: (!ts_config.queryfile && ts_config.data && !ts_config.digest) ||
444: (!ts_config.queryfile && !ts_config.data && ts_config.digest)) && ts_config.in != NULL);
1.1 jsing 445: if (ret)
446: goto usage;
447:
1.18 inoguchi 448: ret = !verify_command(ts_config.data, ts_config.digest, ts_config.queryfile, ts_config.in, ts_config.token_in,
449: ts_config.ca_path, ts_config.ca_file, ts_config.untrusted);
1.1 jsing 450: }
451:
452: goto cleanup;
453:
1.15 jsing 454: usage:
1.18 inoguchi 455: ts_usage();
1.1 jsing 456:
1.15 jsing 457: cleanup:
1.1 jsing 458: /* Clean up. */
459: NCONF_free(conf);
460: free(password);
461: OBJ_cleanup();
462:
463: return (ret);
464: }
465:
466: /*
467: * Configuration file-related function definitions.
468: */
469:
470: static ASN1_OBJECT *
471: txt2obj(const char *oid)
472: {
473: ASN1_OBJECT *oid_obj = NULL;
474:
475: if (!(oid_obj = OBJ_txt2obj(oid, 0)))
476: BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
477:
478: return oid_obj;
479: }
480:
481: static CONF *
482: load_config_file(const char *configfile)
483: {
484: CONF *conf = NULL;
485: long errorline = -1;
486:
487: if (!configfile)
488: configfile = getenv("OPENSSL_CONF");
489:
490: if (configfile &&
491: (!(conf = NCONF_new(NULL)) ||
492: NCONF_load(conf, configfile, &errorline) <= 0)) {
493: if (errorline <= 0)
494: BIO_printf(bio_err, "error loading the config file "
495: "'%s'\n", configfile);
496: else
497: BIO_printf(bio_err, "error on line %ld of config file "
498: "'%s'\n", errorline, configfile);
499: }
500: if (conf != NULL) {
501: const char *p;
502:
503: BIO_printf(bio_err, "Using configuration from %s\n",
504: configfile);
505: p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
506: if (p != NULL) {
507: BIO *oid_bio = BIO_new_file(p, "r");
508: if (!oid_bio)
509: ERR_print_errors(bio_err);
510: else {
511: OBJ_create_objects(oid_bio);
512: BIO_free_all(oid_bio);
513: }
514: } else
515: ERR_clear_error();
516: if (!add_oid_section(bio_err, conf))
517: ERR_print_errors(bio_err);
518: }
519: return conf;
520: }
521:
522: /*
523: * Query-related method definitions.
524: */
525:
526: static int
1.19 ! inoguchi 527: query_command(const char *data, char *digest, const EVP_MD *md,
1.1 jsing 528: const char *policy, int no_nonce, int cert, const char *in,
529: const char *out, int text)
530: {
531: int ret = 0;
532: TS_REQ *query = NULL;
533: BIO *in_bio = NULL;
534: BIO *data_bio = NULL;
535: BIO *out_bio = NULL;
536:
537: /* Build query object either from file or from scratch. */
538: if (in != NULL) {
539: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
540: goto end;
541: query = d2i_TS_REQ_bio(in_bio, NULL);
542: } else {
543: /* Open the file if no explicit digest bytes were specified. */
544: if (!digest &&
545: !(data_bio = BIO_open_with_default(data, "rb", stdin)))
546: goto end;
547: /* Creating the query object. */
548: query = create_query(data_bio, digest, md,
549: policy, no_nonce, cert);
550: /* Saving the random number generator state. */
551: }
552: if (query == NULL)
553: goto end;
554:
555: /* Write query either in ASN.1 or in text format. */
556: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
557: goto end;
558: if (text) {
559: /* Text output. */
560: if (!TS_REQ_print_bio(out_bio, query))
561: goto end;
562: } else {
563: /* ASN.1 output. */
564: if (!i2d_TS_REQ_bio(out_bio, query))
565: goto end;
566: }
567:
568: ret = 1;
569:
1.15 jsing 570: end:
1.1 jsing 571: ERR_print_errors(bio_err);
572:
573: /* Clean up. */
574: BIO_free_all(in_bio);
575: BIO_free_all(data_bio);
576: BIO_free_all(out_bio);
577: TS_REQ_free(query);
578:
579: return ret;
580: }
581:
582: static BIO *
1.19 ! inoguchi 583: BIO_open_with_default(const char *file, const char *mode, FILE *default_fp)
1.1 jsing 584: {
585: return file == NULL ? BIO_new_fp(default_fp, BIO_NOCLOSE) :
586: BIO_new_file(file, mode);
587: }
588:
589: static TS_REQ *
1.19 ! inoguchi 590: create_query(BIO *data_bio, char *digest, const EVP_MD *md,
1.1 jsing 591: const char *policy, int no_nonce, int cert)
592: {
593: int ret = 0;
594: TS_REQ *ts_req = NULL;
595: int len;
596: TS_MSG_IMPRINT *msg_imprint = NULL;
597: X509_ALGOR *algo = NULL;
598: unsigned char *data = NULL;
599: ASN1_OBJECT *policy_obj = NULL;
600: ASN1_INTEGER *nonce_asn1 = NULL;
601:
602: /* Setting default message digest. */
603: if (!md && !(md = EVP_get_digestbyname("sha1")))
604: goto err;
605:
606: /* Creating request object. */
607: if (!(ts_req = TS_REQ_new()))
608: goto err;
609:
610: /* Setting version. */
611: if (!TS_REQ_set_version(ts_req, 1))
612: goto err;
613:
614: /* Creating and adding MSG_IMPRINT object. */
615: if (!(msg_imprint = TS_MSG_IMPRINT_new()))
616: goto err;
617:
618: /* Adding algorithm. */
619: if (!(algo = X509_ALGOR_new()))
620: goto err;
621: if (!(algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))))
622: goto err;
623: if (!(algo->parameter = ASN1_TYPE_new()))
624: goto err;
625: algo->parameter->type = V_ASN1_NULL;
626: if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
627: goto err;
628:
629: /* Adding message digest. */
630: if ((len = create_digest(data_bio, digest, md, &data)) == 0)
631: goto err;
632: if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
633: goto err;
634:
635: if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
636: goto err;
637:
638: /* Setting policy if requested. */
639: if (policy && !(policy_obj = txt2obj(policy)))
640: goto err;
641: if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
642: goto err;
643:
644: /* Setting nonce if requested. */
645: if (!no_nonce && !(nonce_asn1 = create_nonce(NONCE_LENGTH)))
646: goto err;
647: if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
648: goto err;
649:
650: /* Setting certificate request flag if requested. */
651: if (!TS_REQ_set_cert_req(ts_req, cert))
652: goto err;
653:
654: ret = 1;
655:
1.15 jsing 656: err:
1.1 jsing 657: if (!ret) {
658: TS_REQ_free(ts_req);
659: ts_req = NULL;
660: BIO_printf(bio_err, "could not create query\n");
661: }
662: TS_MSG_IMPRINT_free(msg_imprint);
663: X509_ALGOR_free(algo);
664: free(data);
665: ASN1_OBJECT_free(policy_obj);
666: ASN1_INTEGER_free(nonce_asn1);
667:
668: return ts_req;
669: }
670:
671: static int
1.19 ! inoguchi 672: create_digest(BIO *input, char *digest, const EVP_MD *md,
1.1 jsing 673: unsigned char **md_value)
674: {
675: int md_value_len;
676:
677: md_value_len = EVP_MD_size(md);
678: if (md_value_len < 0)
679: goto err;
680: if (input) {
681: /* Digest must be computed from an input file. */
1.16 tb 682: EVP_MD_CTX *md_ctx;
1.1 jsing 683: unsigned char buffer[4096];
684: int length;
685:
686: *md_value = malloc(md_value_len);
1.17 tb 687: if (*md_value == NULL)
1.1 jsing 688: goto err;
689:
1.16 tb 690: if ((md_ctx = EVP_MD_CTX_new()) == NULL)
691: goto err;
692:
693: EVP_DigestInit(md_ctx, md);
1.1 jsing 694: while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
1.16 tb 695: EVP_DigestUpdate(md_ctx, buffer, length);
1.1 jsing 696: }
1.16 tb 697: EVP_DigestFinal(md_ctx, *md_value, NULL);
698:
699: EVP_MD_CTX_free(md_ctx);
1.1 jsing 700: } else {
701: /* Digest bytes are specified with digest. */
702: long digest_len;
703: *md_value = string_to_hex(digest, &digest_len);
704: if (!*md_value || md_value_len != digest_len) {
705: free(*md_value);
706: *md_value = NULL;
707: BIO_printf(bio_err, "bad digest, %d bytes "
708: "must be specified\n", md_value_len);
709: goto err;
710: }
711: }
712:
713: return md_value_len;
1.15 jsing 714: err:
1.1 jsing 715: return 0;
716: }
717:
718: static ASN1_INTEGER *
719: create_nonce(int bits)
720: {
721: unsigned char buf[20];
722: ASN1_INTEGER *nonce = NULL;
723: int len = (bits - 1) / 8 + 1;
724: int i;
725:
726: /* Generating random byte sequence. */
727: if (len > (int) sizeof(buf))
728: goto err;
1.3 jsing 729: arc4random_buf(buf, len);
1.1 jsing 730:
731: /* Find the first non-zero byte and creating ASN1_INTEGER object. */
732: for (i = 0; i < len && !buf[i]; ++i)
733: ;
734: if (!(nonce = ASN1_INTEGER_new()))
735: goto err;
736: free(nonce->data);
737: /* Allocate at least one byte. */
738: nonce->length = len - i;
739: if (!(nonce->data = malloc(nonce->length + 1)))
740: goto err;
741: memcpy(nonce->data, buf + i, nonce->length);
742:
743: return nonce;
744:
1.15 jsing 745: err:
1.1 jsing 746: BIO_printf(bio_err, "could not create nonce\n");
747: ASN1_INTEGER_free(nonce);
748: return NULL;
749: }
750: /*
751: * Reply-related method definitions.
752: */
753:
754: static int
1.19 ! inoguchi 755: reply_command(CONF *conf, char *section, char *queryfile,
1.1 jsing 756: char *passin, char *inkey, char *signer, char *chain, const char *policy,
757: char *in, int token_in, char *out, int token_out, int text)
758: {
759: int ret = 0;
760: TS_RESP *response = NULL;
761: BIO *in_bio = NULL;
762: BIO *query_bio = NULL;
763: BIO *inkey_bio = NULL;
764: BIO *signer_bio = NULL;
765: BIO *out_bio = NULL;
766:
767: /* Build response object either from response or query. */
768: if (in != NULL) {
769: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
770: goto end;
771: if (token_in) {
772: /*
773: * We have a ContentInfo (PKCS7) object, add
774: * 'granted' status info around it.
775: */
776: response = read_PKCS7(in_bio);
777: } else {
778: /* We have a ready-made TS_RESP object. */
779: response = d2i_TS_RESP_bio(in_bio, NULL);
780: }
781: } else {
1.6 bcook 782: response = create_response(conf, section, queryfile,
1.1 jsing 783: passin, inkey, signer, chain,
784: policy);
785: if (response)
786: BIO_printf(bio_err, "Response has been generated.\n");
787: else
788: BIO_printf(bio_err, "Response is not generated.\n");
789: }
790: if (response == NULL)
791: goto end;
792:
793: /* Write response either in ASN.1 or text format. */
794: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
795: goto end;
796: if (text) {
797: /* Text output. */
798: if (token_out) {
799: TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
800: if (!TS_TST_INFO_print_bio(out_bio, tst_info))
801: goto end;
802: } else {
803: if (!TS_RESP_print_bio(out_bio, response))
804: goto end;
805: }
806: } else {
807: /* ASN.1 DER output. */
808: if (token_out) {
809: PKCS7 *token = TS_RESP_get_token(response);
810: if (!i2d_PKCS7_bio(out_bio, token))
811: goto end;
812: } else {
813: if (!i2d_TS_RESP_bio(out_bio, response))
814: goto end;
815: }
816: }
817:
818: ret = 1;
819:
1.15 jsing 820: end:
1.1 jsing 821: ERR_print_errors(bio_err);
822:
823: /* Clean up. */
824: BIO_free_all(in_bio);
825: BIO_free_all(query_bio);
826: BIO_free_all(inkey_bio);
827: BIO_free_all(signer_bio);
828: BIO_free_all(out_bio);
829: TS_RESP_free(response);
830:
831: return ret;
832: }
833:
834: /* Reads a PKCS7 token and adds default 'granted' status info to it. */
835: static TS_RESP *
1.19 ! inoguchi 836: read_PKCS7(BIO *in_bio)
1.1 jsing 837: {
838: int ret = 0;
839: PKCS7 *token = NULL;
840: TS_TST_INFO *tst_info = NULL;
841: TS_RESP *resp = NULL;
842: TS_STATUS_INFO *si = NULL;
843:
844: /* Read PKCS7 object and extract the signed time stamp info. */
845: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
846: goto end;
847: if (!(tst_info = PKCS7_to_TS_TST_INFO(token)))
848: goto end;
849:
850: /* Creating response object. */
851: if (!(resp = TS_RESP_new()))
852: goto end;
853:
854: /* Create granted status info. */
855: if (!(si = TS_STATUS_INFO_new()))
856: goto end;
857: if (!(ASN1_INTEGER_set(si->status, TS_STATUS_GRANTED)))
858: goto end;
859: if (!TS_RESP_set_status_info(resp, si))
860: goto end;
861:
862: /* Setting encapsulated token. */
863: TS_RESP_set_tst_info(resp, token, tst_info);
864: token = NULL; /* Ownership is lost. */
865: tst_info = NULL; /* Ownership is lost. */
866:
867: ret = 1;
1.15 jsing 868: end:
1.1 jsing 869: PKCS7_free(token);
870: TS_TST_INFO_free(tst_info);
871: if (!ret) {
872: TS_RESP_free(resp);
873: resp = NULL;
874: }
875: TS_STATUS_INFO_free(si);
876: return resp;
877: }
878:
879: static TS_RESP *
1.19 ! inoguchi 880: create_response(CONF *conf, const char *section,
1.1 jsing 881: char *queryfile, char *passin, char *inkey,
882: char *signer, char *chain, const char *policy)
883: {
884: int ret = 0;
885: TS_RESP *response = NULL;
886: BIO *query_bio = NULL;
887: TS_RESP_CTX *resp_ctx = NULL;
888:
889: if (!(query_bio = BIO_new_file(queryfile, "rb")))
890: goto end;
891:
892: /* Getting TSA configuration section. */
893: if (!(section = TS_CONF_get_tsa_section(conf, section)))
894: goto end;
895:
896: /* Setting up response generation context. */
897: if (!(resp_ctx = TS_RESP_CTX_new()))
898: goto end;
899:
900: /* Setting serial number provider callback. */
901: if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
902: goto end;
903:
904: /* Setting TSA signer certificate. */
905: if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
906: goto end;
907:
908: /* Setting TSA signer certificate chain. */
909: if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
910: goto end;
911:
912: /* Setting TSA signer private key. */
913: if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
914: goto end;
915:
916: /* Setting default policy OID. */
917: if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
918: goto end;
919:
920: /* Setting acceptable policy OIDs. */
921: if (!TS_CONF_set_policies(conf, section, resp_ctx))
922: goto end;
923:
924: /* Setting the acceptable one-way hash algorithms. */
925: if (!TS_CONF_set_digests(conf, section, resp_ctx))
926: goto end;
927:
928: /* Setting guaranteed time stamp accuracy. */
929: if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
930: goto end;
931:
932: /* Setting the precision of the time. */
933: if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
934: goto end;
935:
936: /* Setting the ordering flaf if requested. */
937: if (!TS_CONF_set_ordering(conf, section, resp_ctx))
938: goto end;
939:
940: /* Setting the TSA name required flag if requested. */
941: if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
942: goto end;
943:
944: /* Setting the ESS cert id chain flag if requested. */
945: if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
946: goto end;
947:
948: /* Creating the response. */
949: if (!(response = TS_RESP_create_response(resp_ctx, query_bio)))
950: goto end;
951:
952: ret = 1;
1.15 jsing 953: end:
1.1 jsing 954: if (!ret) {
955: TS_RESP_free(response);
956: response = NULL;
957: }
958: TS_RESP_CTX_free(resp_ctx);
959: BIO_free_all(query_bio);
960:
961: return response;
962: }
963:
964: static ASN1_INTEGER *
1.19 ! inoguchi 965: serial_cb(TS_RESP_CTX *ctx, void *data)
1.1 jsing 966: {
967: const char *serial_file = (const char *) data;
968: ASN1_INTEGER *serial = next_serial(serial_file);
969:
970: if (!serial) {
971: TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
972: "Error during serial number "
973: "generation.");
974: TS_RESP_CTX_add_failure_info(ctx,
975: TS_INFO_ADD_INFO_NOT_AVAILABLE);
976: } else
977: save_ts_serial(serial_file, serial);
978:
979: return serial;
980: }
981:
982: static ASN1_INTEGER *
983: next_serial(const char *serialfile)
984: {
985: int ret = 0;
986: BIO *in = NULL;
987: ASN1_INTEGER *serial = NULL;
988: BIGNUM *bn = NULL;
989:
990: if (!(serial = ASN1_INTEGER_new()))
991: goto err;
992:
993: if (!(in = BIO_new_file(serialfile, "r"))) {
994: ERR_clear_error();
995: BIO_printf(bio_err, "Warning: could not open file %s for "
996: "reading, using serial number: 1\n", serialfile);
997: if (!ASN1_INTEGER_set(serial, 1))
998: goto err;
999: } else {
1000: char buf[1024];
1001: if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
1002: BIO_printf(bio_err, "unable to load number from %s\n",
1003: serialfile);
1004: goto err;
1005: }
1006: if (!(bn = ASN1_INTEGER_to_BN(serial, NULL)))
1007: goto err;
1008: ASN1_INTEGER_free(serial);
1009: serial = NULL;
1010: if (!BN_add_word(bn, 1))
1011: goto err;
1012: if (!(serial = BN_to_ASN1_INTEGER(bn, NULL)))
1013: goto err;
1014: }
1015: ret = 1;
1.15 jsing 1016: err:
1.1 jsing 1017: if (!ret) {
1018: ASN1_INTEGER_free(serial);
1019: serial = NULL;
1020: }
1021: BIO_free_all(in);
1022: BN_free(bn);
1023: return serial;
1024: }
1025:
1026: static int
1.19 ! inoguchi 1027: save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
1.1 jsing 1028: {
1029: int ret = 0;
1030: BIO *out = NULL;
1031:
1032: if (!(out = BIO_new_file(serialfile, "w")))
1033: goto err;
1034: if (i2a_ASN1_INTEGER(out, serial) <= 0)
1035: goto err;
1036: if (BIO_puts(out, "\n") <= 0)
1037: goto err;
1038: ret = 1;
1.15 jsing 1039: err:
1.1 jsing 1040: if (!ret)
1041: BIO_printf(bio_err, "could not save serial number to %s\n",
1042: serialfile);
1043: BIO_free_all(out);
1044: return ret;
1045: }
1046:
1047: /*
1048: * Verify-related method definitions.
1049: */
1050:
1051: static int
1052: verify_command(char *data, char *digest, char *queryfile, char *in,
1053: int token_in, char *ca_path, char *ca_file, char *untrusted)
1054: {
1055: BIO *in_bio = NULL;
1056: PKCS7 *token = NULL;
1057: TS_RESP *response = NULL;
1058: TS_VERIFY_CTX *verify_ctx = NULL;
1059: int ret = 0;
1060:
1061: /* Decode the token (PKCS7) or response (TS_RESP) files. */
1062: if (!(in_bio = BIO_new_file(in, "rb")))
1063: goto end;
1064: if (token_in) {
1065: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
1066: goto end;
1067: } else {
1068: if (!(response = d2i_TS_RESP_bio(in_bio, NULL)))
1069: goto end;
1070: }
1071:
1072: if (!(verify_ctx = create_verify_ctx(data, digest, queryfile,
1073: ca_path, ca_file, untrusted)))
1074: goto end;
1075:
1076: /* Checking the token or response against the request. */
1077: ret = token_in ?
1078: TS_RESP_verify_token(verify_ctx, token) :
1079: TS_RESP_verify_response(verify_ctx, response);
1080:
1.15 jsing 1081: end:
1.1 jsing 1082: printf("Verification: ");
1083: if (ret)
1084: printf("OK\n");
1085: else {
1086: printf("FAILED\n");
1087: /* Print errors, if there are any. */
1088: ERR_print_errors(bio_err);
1089: }
1090:
1091: /* Clean up. */
1092: BIO_free_all(in_bio);
1093: PKCS7_free(token);
1094: TS_RESP_free(response);
1095: TS_VERIFY_CTX_free(verify_ctx);
1096: return ret;
1097: }
1098:
1099: static TS_VERIFY_CTX *
1100: create_verify_ctx(char *data, char *digest, char *queryfile, char *ca_path,
1101: char *ca_file, char *untrusted)
1102: {
1103: TS_VERIFY_CTX *ctx = NULL;
1104: BIO *input = NULL;
1105: TS_REQ *request = NULL;
1106: int ret = 0;
1107:
1108: if (data != NULL || digest != NULL) {
1109: if (!(ctx = TS_VERIFY_CTX_new()))
1110: goto err;
1111: ctx->flags = TS_VFY_VERSION | TS_VFY_SIGNER;
1112: if (data != NULL) {
1113: ctx->flags |= TS_VFY_DATA;
1114: if (!(ctx->data = BIO_new_file(data, "rb")))
1115: goto err;
1116: } else if (digest != NULL) {
1117: long imprint_len;
1118: ctx->flags |= TS_VFY_IMPRINT;
1119: if (!(ctx->imprint = string_to_hex(digest,
1120: &imprint_len))) {
1121: BIO_printf(bio_err, "invalid digest string\n");
1122: goto err;
1123: }
1124: ctx->imprint_len = imprint_len;
1125: }
1126: } else if (queryfile != NULL) {
1127: /*
1128: * The request has just to be read, decoded and converted to
1129: * a verify context object.
1130: */
1131: if (!(input = BIO_new_file(queryfile, "rb")))
1132: goto err;
1133: if (!(request = d2i_TS_REQ_bio(input, NULL)))
1134: goto err;
1135: if (!(ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)))
1136: goto err;
1137: } else
1138: return NULL;
1139:
1140: /* Add the signature verification flag and arguments. */
1141: ctx->flags |= TS_VFY_SIGNATURE;
1142:
1143: /* Initialising the X509_STORE object. */
1144: if (!(ctx->store = create_cert_store(ca_path, ca_file)))
1145: goto err;
1146:
1147: /* Loading untrusted certificates. */
1148: if (untrusted && !(ctx->certs = TS_CONF_load_certs(untrusted)))
1149: goto err;
1150:
1151: ret = 1;
1.15 jsing 1152: err:
1.1 jsing 1153: if (!ret) {
1154: TS_VERIFY_CTX_free(ctx);
1155: ctx = NULL;
1156: }
1157: BIO_free_all(input);
1158: TS_REQ_free(request);
1159: return ctx;
1160: }
1161:
1162: static X509_STORE *
1163: create_cert_store(char *ca_path, char *ca_file)
1164: {
1165: X509_STORE *cert_ctx = NULL;
1166: X509_LOOKUP *lookup = NULL;
1167: int i;
1168:
1169: /* Creating the X509_STORE object. */
1170: cert_ctx = X509_STORE_new();
1171:
1172: /* Setting the callback for certificate chain verification. */
1173: X509_STORE_set_verify_cb(cert_ctx, verify_cb);
1174:
1175: /* Adding a trusted certificate directory source. */
1176: if (ca_path) {
1177: lookup = X509_STORE_add_lookup(cert_ctx,
1178: X509_LOOKUP_hash_dir());
1179: if (lookup == NULL) {
1180: BIO_printf(bio_err, "memory allocation failure\n");
1181: goto err;
1182: }
1183: i = X509_LOOKUP_add_dir(lookup, ca_path, X509_FILETYPE_PEM);
1184: if (!i) {
1185: BIO_printf(bio_err, "Error loading directory %s\n",
1186: ca_path);
1187: goto err;
1188: }
1189: }
1190: /* Adding a trusted certificate file source. */
1191: if (ca_file) {
1192: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
1193: if (lookup == NULL) {
1194: BIO_printf(bio_err, "memory allocation failure\n");
1195: goto err;
1196: }
1197: i = X509_LOOKUP_load_file(lookup, ca_file, X509_FILETYPE_PEM);
1198: if (!i) {
1199: BIO_printf(bio_err, "Error loading file %s\n", ca_file);
1200: goto err;
1201: }
1202: }
1203: return cert_ctx;
1.15 jsing 1204: err:
1.1 jsing 1205: X509_STORE_free(cert_ctx);
1206: return NULL;
1207: }
1208:
1209: static int
1.19 ! inoguchi 1210: verify_cb(int ok, X509_STORE_CTX *ctx)
1.1 jsing 1211: {
1212: /*
1213: char buf[256];
1214:
1215: if (!ok)
1216: {
1217: X509_NAME_oneline(X509_get_subject_name(ctx->current_cert),
1218: buf, sizeof(buf));
1219: printf("%s\n", buf);
1220: printf("error %d at %d depth lookup: %s\n",
1221: ctx->error, ctx->error_depth,
1222: X509_verify_cert_error_string(ctx->error));
1223: }
1224: */
1225:
1226: return ok;
1227: }
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